Wire-drawing machine.



E. H. CARROLL. WIRE DRAWING MACHINE. APPLICATION FILED mmzs, 1909 2SHEETS-SHEET 1.

Patented Dec. 17, 1912.

[77, 0017, for

Elberf H Carroll.

i wcw @M MM.

E. H. CARROLL.

WIRE DRAWING MACHINE.

APPLIOATION FILED JAN. 25, 1909.

Patented Dec. 17, 1912 2 SHEETS-SHEET 2.

h z fnesses [nven for B, [Z Zberf H [1151 11 @wwmhw' B W W I a forney HTED strnrns PATENT OFFICE.

ELBERT H. CARROLL, F WORCESTER, MASSACHUSETTS, ASSIGNOR TO MORGAN CON-STRUCTION COMPANY, OF WORCESTER, MASSACHUSETTS, A CORPORATION OIEMAS-SACHUSETTS.

WIRE-DRAWING MACHINE.

Specification of Letters Patent.

Application filed January 25', 1909. Serial No. 474,129.

- To all whom it concern."

Be it known that I, ELBERT H. CARROLL, a citizen of the United States,residing at Worcester, in the county of Worcester and Commonwealth ofMassachusetts, have invented a new and useful Improvement 1nWire-Drawing Machines, of which the following is a specification,accompanied by drawings forming a part of the same, in which 1 l Figure1 represents a plan view of a wire drawin machine embodying my improve:ment. Fig. 2 is a side elevationof the same.- Fig. 3 is a side elevationpartly shown" in section, and Fig. 4 is a detached plan View of aportion of the operative parts of the machine. I

Similar reference letters and figures refer to similar parts in thedifferent views.

My present invention relates to that class of wire drawing machlnes inwhich a rotating block is employed, whereon the wire is wound as it isdrawn through a reducing die, and it has for its objects to provide animproved mechanism for connecting and disconnecting the wire drawingblock with its driving mechanism; to provide means for automaticallystopping the block after the initial draft of wire through the die, andfurther to provide means for automatically stopping the block when theprogress of the wire to the reducing block is ,impeded by kinks orotherwise, and I accomplish these objects by the construction andarrangement of parts as hereinafter described and pointed out in theannexed claims.

Referring to the accompanying drawings, 1 denotes a portion of theframework of the machine, 2 a rotating wire drawing block which isoperatively connected with a vertical shaft 3, in the present instance,by means of a clutch mechanism 'comprisin a jaw 4 on the under side ofthe wire drawing block, which is engaged by a jaw 5 carried by thevertical shaft 3, which in turn is driven through beveled-gears 6 and 7from a driving shaft 8. The under side of the block 2 is provided withan annular track 9,

ported in a yoke 11, which has gudgeons or bearings 12, 12, supported inseats 13, forming a part of the framework of the machine.

The yoke 11 is provided with an arm 14, the free end of which ispivotally connected by a link 15 with an arm 16 attached to a rock shaft17. A spiral spring 18connects thearm l twith the fixed framework of themachine, with the tension of the spring applied to depress the free endof the arm 14, the spring having sufiicient force to raise the friction"rolls 10 against the annular track 9 and lift the rotating wire drawingblock 2 from its clutch connection with the shaft 3. The outer end ofthe rocking shaft 17 is polygonal, as shown at 19, Fig. 2, and carries atwo-armed foot treadle 20. By de pressin the end '21 of the foottreadle, the shaft 1 is rocked to carry the arms 14 and 16 and link 15into the positions shown in Fig. 2, with the upper end of the arm 16bearing against a stop 22 projecting from the framework of the machine,said stop re ceiving the pressure exerted by the spring 18 to hold 'thecenter. of the pivotal pin 23 slightly to the right of a vertical lineconnecting the center of the rocking shaft 17 and the pivotal pin 24:,thereby holding the parts in position against accidental diser todisconnect the block 2 from its Patented Dec. 17, 1912.

driving mechanism, the end 25 of the twoarmed treadle is depressedsufficiently to carry the pivotal pin 23 past the center line, joiningthe pin 24 and shaft 17, when the tension of the spiral spring 18 willcontinue the rocking motion of th shaft the link 15 and arm 16 into thenoted by the dot and dash lines 26, thereby carrying the friction rolls10 against the annular track 9 and lifting the wire drawing block 2sufficiently to disengage it from its clutching mechanlsm. A very slightangu- 17, bringing I position delar movement of the rocking shaft 17 isall that is required to bring the spring 18 into action in disengagingthe rotating block 2.

The wire drawing block 2 is provided with an opening 27 to receive ahook 28 to which a chain 29 is attached, provided at its end with agripping mechanism 30, by which the end of the wire 31to be drawn may beseized and drawn through a'reducing die 32,

held in a .die box 33 far enough to be seized' by a clamping-mechanism34, or in the position shown in Fig. 1. When this is accomplished, therotation of the wire drawing tact with a radial arm 36, which is carriedupon the upper end of a vertical rocking 'shaft 37. The lower end of theshaft 37 is provided with a radial arm 38, the free end of whichispivotally connected by means of a link 39 with aradial arm 40 on thelower end of the rocking shaft 41. The rocking shaft 41 is provided witha radial arm 42.

The arm 42 is pivotally connected by a link 43 with a lever 44, capableof a swinging movement upon a short vertical shaft 45, journaled in abearing 46 in the framework of the machine. Pivoted to the free end ofthe swinging lever 44 are a pair of parallel bars 47 and 48, capable ofsliding in ways formed in a vertical wing piece 49, rojecting from theinside of the frame. ivoted at 50, between the bars 47 and 48, is a pawl51. In its normal position the pawl 51 is held with its end 52 inalinement with the link 15. The pawl 51 is maintained in this positionby'means of a spiral spring 53, inclosing a rod 54, which passes througha yoke'55 and carries on its outer end a nut 56. The nut 56 limits theswinging movement of the pawl 51 under the tension of the spring 53. V

When the spur 35- rocks the'shaft 37 by its contact with the arm 36, itdraws the link 39 r in the direction of the arrow a and, through theintermediate mechanism already describedymovesthe parallel'bars 47 and48 in the direction of the arrow 1), Fig. 4, causingthe end 52 of thepawl 51 to press against the side of the link 15 and swing it past thecenter line between the rocking shaft 17 and the pivot 24, so that thespring 18 will instantly act to throw the link 15 into the -*pos1t1onindicated by the dot and dash lines 26, thereby lifting the frictionrolls .10 sufliciently to raise the rotating block 2 out of engagementwith the shaft 3. This stops the further inding of the wire 31 anddisconnects the block 2, so the end of the wire may be released from thegrip 30 and seized by the' grip 34. The foot-treadle 20 is then rockedby the depression of its end 21 into the position shown in Fig. 2,thereby lowering the .block 2 into operative relation with the drivingpower.

The vertical rocking shaft 41, in addition to the radial arms 40 and 42is provided with a radial arm 57, provided with a notch 58 in its uppersurface, through which the wire 31 is conducted to the die box 33. Thenotch 58 is restricted'to substantially the s1ze of the wire, so thatakink or bend in the wire, like that shown by the broken lines at 59,Fig. 1, for exam le, which would impede the passage of the wire throughthe die will also act upon the radial arm 57 to swing it in thedirection of the arrow c,Fig. 1, thereby rocking the shaft 41, in thesame manner as it would be rocked by the contact of the spur 35 againstthe radial arm 36, as above described, causing the parallel bars 47 and48 and pawl 51 to be moved in the direction of the arrow 12, Fig. 4.This movement of the pawl 51 against the side of the link 15 will throwthe link 15 and arm 16 past the center line, so that the spring 18 willact to throw the link 15 and arm 16 into the position denoted by the dotand dash lines 26, Fig. 2, thereby disconnecting the drawing block 2.

The link 15 and arm 16 form substantially a toggle-joint connectionbetween the rocking shaft 17 and the free end of the arm 14, and as thepivotal connection 23 is carried past the center line between the axesof 17 and 24, while the block is in an operative position, it requiresbut a slight pressure either against the link 15 by means of the pawl 51or upon the end 25 of the foot treadle by the operator to immediatelybring the spring 18 into action to disconnect the wire drawing blockfrom its driving power.

Attached to the shaft 45 bymeans of a spline 60 is a disk 61 providedwith a depending clutch tooth 62, adapted to engage a shoulder 63 on thelever 44. The disk 61 is provided with an arm 64, which is connectedwith the rigid framework of the machine by a spiral spring 65. To theupper end of the vertical shaft 45 is rigidly attached a radial arm 66,to the free end of which the die box 33 has a pivotal connection. Theradial arm 66 is capable of a slight swinging movement within an opening67 in the framework of the machine, and, when the drawing block is notin use,

the radial arm 66 is normally held against Y of the arm 66 is limited bythe side 69 of.

the opening 67. In this position the shoulder 63 of the lever 44 is heldagainst the clutch tooth 62 by means of a spiral spr1ng 70, whichconnects the lever 44 wlt-h the fixed framework of the machine.

Should a breakage occur in the w1 re between the drawing block 2 and thedie, the tensile strain upon the wire would be removed, and the verticalshaft 45 w1ll be instantly rocked by the tension of the spring 65,causin means of tie connection between the clutch tooth 62 and theshoulder 63, again mov ng the parallel bars 47 and 48 in the d rectionof the arrow 5, Fig. 4, and carrying the the lever 44 to be swung bypawl51 against thelink 15 to throw the togv gle-joint past the centerand cause the spring 18 to disconnect thewire drawing block 2 from thedriving power.

By the above described mechanism the wire drawing block will becomestopped under the following conditions; first, at the beginning ofitsrotation when the spur 35 contacts with the radial arm 36, enablingthe end of the wire to be transferredfrom the gripping mechanism 30 tothe clamping mechanism 34; second, whenever a kink or obstruction in thewire is too large to pass through the notch 58; and, third, whenever abreakage occurs in the wire between the wire drawing blopk and the diebox.

In the operation of stopping the drawing block by means of the abovedescribed mechanism, the pawl 51 has its oblique edge 71 brought intocontact with a fixed stud 72,

which serves to rock the pawl 51 on its.

pivot 50, in order to swing the end of the pawl which contacts with thelink 15 out of alinement with the link, toallow the shaft 17 to berocked by means of thefoot treadle 2O intothe position shown in Fig. 2,for the purpose of starting the wire drawing block without reversing thestopping mechanism.

I claim 1. In a wire drawing machine, comprising a rotatable block, anda clutching mechanism between said block and the driving power, thecombination with the clutching mechanism, of a clutch disengagingmechanism, comprising atoggle jointand springoperatively connected withsaid toggle joint, a movable die block and mechanism operativelyconnected with said die block for ac-' tuating' said toggle joint todisengage the clutching mechanism when'the wirebreaks. 2. In a wiredrawing mechanism, comprising a rotatable block and a clutchingmechanism between said block and the driving power, the combination of amovable die box, a motor spring for disengagingsaid clutching mechanism,a toggle j'oint mechanism for engaging said clutching mechanism, andintermediate operative connections between sa1d movable-dlebox and saidtoggle joint mechanism for actuating the latter to disengage theclutching mechanism when the wire breaks.

-3. 'In a wire drawing mechanism, comprising a rotatable block and aclutching mechanism between said block and .the driving power, thecombination of a movable die box, a spring applied to said die box toresist the strain of the wire, a toggle joint .mechanism for disengagingsaid clutching mechanism, and mechanism actuated by said die box springfor operating said toggle joint mechanism to release the clutchingmechanism when the die box is relieved of the strain of the wire. 4

4. The combination with a die box, a wire drawing block and a clutchingmechanism between said block and the driving power, of a clutchdisengagingmechanism, a motor spring therefor and means for bringingsaid -motor spring into operative relation to said disengagingmechanism, comprising a toggle joint, mechanism for tripping said togglemechanism, and means for holding sa1d spring in a state of tensiondetermined by jointfa spring for actuating said tripping

